In a kilometer race, A can give B a start of 100 m or 15 seconds. How long does A take to complete the race?

(0.5 ×5 + 0.25 ×0.5 + 0.5 × 4 + 0.5 ×0.75) is equal to-

A solid wooden toy is in the shape of a right circular cone mounted on a hemisphere. If the radius of the hemisphere is 4.2 cm. and the total height of the toy is 10.2 cm., find the volume of the wooden toy (nearly).

Ravi travels 300 km. partly by train and partly by car. He takes 4 hr. to reach, if he travels 60 km. by train and rest by car. He will take 10 minutes more if he were to travel 100 km. by train and rest by car. the speed of the train is:

A trader marks his goods at 20% above cost price. If he allows a discount of 5% what is his final profit%?

Cost price of 25 chairs equals the selling price of 20 chairs. Find the profit %.

The product of two consecutive odd numbers is 399. Find the lower of them.

The price of $$ {4{1\over2}}$$ meter of cloth is Rs.$$ {60{3\over4}}$$. Find the cost per meter.